Cement-applying mechanism



2 Sheets-Sheet l OriginaIFiled Feb. 4, 1941 y 1943- B. JORGENSEN I CEMENT APPLYING MECHANISM 2 Sheets-Sheet 2 Original Filed Feb. 4, 1941 a m 6 0 I m 1 w .5 w m wwwfi m l e. 1% 4 M. w! w W M z w 4 MU/ U m v V Y \IMM 0 0 3 P Patented July 20, 1943 UNIT ED STATES PATENT OFFICE CEMENT-APPLYING MECHANISM Bernhardt Jorgensen, Marblehead, Mass., as-

signor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Original application February 4, 1941, Serial No.

Divided and this application March 24, 1942, Serial No. 435,089

16 Claims.

This invention relates to cement-applying mechanism, this application being a division of a copending application of a mine for Letters Patent for improvements in Machines for use in the manufacture of shoes, Serial No. 377,347, filed on February 4, 1941. An immediate object of the invention is to provide means for applying cement to shoes for use in securing the uppers in lasted relation to insoles, and the invention is herein illustrated as embodied in mechanism constructed for that purpose as part of the machine shown and described in the above-mentioned application, which is a machine for lasting the toes of shoes; It is to be understood, however, that the invention is not limited to that particular embodiment or t machines for lasting shoes.

With the above and other objects .in view, the invention, in one aspect, provides a cement-ago plying device which is movable toward the work and which has novel means controlled by that movement of the device for delivering cement therefrom. As herein illustrated, the cementap-plying device comprises a cement receptacle and a pump which are movable as a unit heightwise of a shoe into position to apply cement to the shoe, and mechanism for operating the pump to deliver cement in response to that movement of the pump and receptacle. More particularly, the construction shown includes a spring for operating the pump, means for subjecting the spring to stress by the movement of the device toward the shoe and mechanism also controlled by that movement for preventing operation of the pump by the spring until the device has arrived approximately in cement-applying position and for then rendering the spring efiective on the pump.

The above and other features of the invention, including various novel details of construction and combinations of parts, will now be more particularly described with reference to the accompanying drawings and thereafter pointed out in the claims.

In the drawings,

Fig. 1 is a View in vertical section of: a portion of the machine shown in theabove-mentioned application, comprising cement-applying means in which novel features of the present invention are embodied, parts of the structure being bro-ken away;

Fig. 2 is mainly a plan View of the structure shown in Fig. 1 and of other parts associated therewith;

Fig. 3 is a section on the line III-III of Fig. 2;

Fig. 4 shows in elevation, as viewed from the opposite side, the cement-applying means shown in Fig, 2 and further illustrates its relation to a shoe and to other parts shown in section before it has been moved into cement-applying position slightly later time in the operation of the machine.

The machine shown in the previously mentioned application is a lasting machine having various lasting. instrumentalities which cooperate to last the toe end of a shoe positioned.

bottom. upward, including a toe former 2 (Figs.

' 4 and 6) which embraces the toe end of the shoe and Wipes the upper heightwise of the last and Wipers 4 which thereafter wipe the margin of the upper inwardly over an insole on the last.

The machine includes also an upper-trimmingv device (not herein shown) which trims off the margin of all but the outer layer of the toe-end portion of the upper materials, leaving the margin of the outer layer outspread over the wipers as illustrated in Fig. 4. The shoe is positioned in proper relationto the lasting instrumentalities and to the. cement-applying means hereinafter described by a member 6 which engages the bottom of the toe end of the insole and: by a plu rality of pins 8 which extend through holes in the insole into holes provided in the last. The operator mounts the shoe on thepins 8 with the insole in engagement with the member 6 prior to the starting of the cycle of power operations of the machine, After the starting of the machine a toe rest In is moved upwardly to clamp the shoe against the member 6 and to support it thereafter against downward movement durin the operation of the machine.

, to the shoe.

a cement-applying device I2 supported on a carrier I4 which also serves to support the abovementioned upper-trimming mechanism, as fully disclosed in the previously mentioned application. The carrier I4 is clamped on a vertical hollow post I6 which is guided for vertical movements and for turning movements in a cylinder I8 inserted in a tubular portion 20 of the frame of the machine and is further guided by other means not herein shown. By the vertical movements of the post the trimming device and thereafter the cement-applying device are moved downwardly each into position to operate on the shoe, and by swinging movement of the carrier I4 accompanied by turning movement of the post the diiferent devices are positioned respectively over the toe end of the shoe. Initially the carrier I4 is positioned as illustrated in Fig. 2 with the cement-applying device in a position in which it is not over the toe end of the shoe, this position of the carrier being determined by engagement of a bumper 22 thereon with an abutment 24 on the frame of the machine. Swinging movement of the carrier to carry the cementapplying device to a position over the shoe, in which position it is shown in Fig. 4, is eifected after the upper-trimming operation by fluidoperated means not herein shown but fully disclosed in the previously mentioned application. Thereafter the cement-applying device is moved vertically downward by fluid-pressure means into position to engage the shoe and to apply cement For this purpose the upper end of the hollow post I6 is closed by a plug 26 which is threaded therein, and a disk 28 fastened to this plug serves as a holder for packing 30. The upper end portion of the post serves, therefore, as a piston in the cylinder I8, and by fluid admitted at the proper time to the upper end of the cylinder through a pipe 32 downward movement is imparted to the post to move the cement-applying device toward the shoe as above described. Such downward movement of the post is effected against the resistance of a spring v34 which serves thereafter to return it to its-" uppermost position determined by engagement of a bumper 36 on the carrier I4 with the lower end of the tubular portion 20 of the frame. Mechanism not herein shown but disclosed in the above-mentioned application is provided for Y limiting the downward movement of the post.

For purposes of this invention the cement applying device I2, as herein illustrated, is so constructed as to adapt it for use to apply to the shoe thermoplastic cement maintained by heat in a liquid condition, although cement of a different kind may be used if desired. It includes a casting 38 having therein a cement-containing chamber 40. The casting 38, which thus serves as a cement receptacle, is supported directly by T means of rods 42 and 44 on the front ends of upper and lower pairs of parallel links 46 and 48 the rear ends of which are mounted respectively on rods 50 and 52 on the carrier I4. The

two upper links 46 are connected together by a an ear 64 on one of the links 46 and is arranged to engage a vertical face on the carrier I4. The

spring 60 is yieldable to permit any further downward movement of the carrier I4 which may take place after downward movement of the casting 38 is stopped by the shoe in the manner hereinafter explained. A cover 66 on the top of the casting 38 is removable to permit cement in a solid state to be introduced into the chamber 40. To melt the cement and maintain it in a liquid condition the casting 36 is heated by electrical heating units 68 (Fig. 2) mounted in bores formed therein, these units being supplied with current by wires mounted in conduits I0 leading from a junction box 12 on the carrier I4 to which current is supplied under control of a thermostat (not shown) connected by a capillary tube I4 to the casting 38.

Mounted in a bore in the lower end of the casting 38 is a cylindrical upwardly extending portion of a block IS the lower portion of which is of horseshoe shape, as shown in Fig. 6, and is provided with two bores I8 communicating with each other through a chamber 30. This horseshoe-shaped portion of the block I6 is arranged to engage the marginal portion of the toe end of the insole and to act as a holddown thereon, and extending through it from the bores I8 and the chamber are holes 82 through which cement is applied to the insole. The chamber 80 communicates through an upwardly extending bore 84 inthe block 16 with a chamber 86 in'the casting 38, and this chamber is arranged to communicate with another chamber 88 from which a passage 90 leads to the cement-containing chamber 40. Leading upwardly from the chambe 88 is a bore 92 in the casting 38 in which is mounted a plunger 94, the plunger cooperating with the adjacent wall of the casting to provide a pump. Normally closing the passage 90 is a ball valve 96 held on its seat by a spring 98 mounted between the valve and the lower end of the plunger 94, and normally closing communication between the chamber 86 and the chamber 88 is a ball valve I08 held on its seat by a spring I02. When the plunger 94 is moved upwardly it draws a certain amount of cement past the valve 96 into the chamber 88, and when it is moved'downwardly it forcesa corresponding amount of cement past the valve I 00 into the chamber 86 and forces the same amount through the passage 84 and the holes 82 to apply the cement to the toe end of the insole. A port I04 in the casting 38 permits any cement which may leak past the plunger 84 to return to the chamber 40.

The plunger 94 is moved downwardly to deliver cement in'the manner above described as a result of the downward movement of the carrier E4 to carry the cement-applying device toward the shoe. For this purpose there is mounted" to swing about the previously mentioned rod'50 a lever I06 (Figs. 2 and 4) having a'downwardly extending arm I08 provided with a roll H0 arranged to engage a relatively stationary plate II2 with which the machin is provided, the position of this plate being illustrated in Fig. 4; Prior to the downward movement of the'carrier I4 the, roll H6 is positioned a short distance above the plate I i2, and in response to the downward movement of the carrier the roll is carried into engagement with the plate and then the lever I06 is swung about the rod 50 by the action of the plate on the lever during further downward movement of the carrier. Another arm I I4 of the lever I06 carries a trunnion block II 6 slidingly mounted on a rod H8 and engaging one end. of a compression spring I20 the other end of which abuts plates I50 and wedging the block 16 upwardly until it engages the margin on top of the wipers, as illustrated in Fig. '7. By their continued movement the wipers withdraw the margin of the upper from under the block 16 and wipe it fully down on the insole. It will be understood that as the margin of the upper is wiped inwardly under the block 16 this block serves to heat it and also to apply to it any cement which adheres to the lower face of the block. After the wipers have thus wiped the margin of the upper inwardly, fluid is released from the cylinder l8 to cause the spring 34 to lift the carrier [4 and thus to Withdraw the cement-applying device from the shoe, after which the carrier [4 is swung back to its initial position determined by engagement of the bumper 22 with the abutment 24 (Fig. 2). In response to the upward movement of the carrier the spring E46 acts on the lever I06 to return the rod I Hi to the position in which it is again held by the latch lever I36, thereby moving the pump plunger 94 upwardly to draw additional cement from the chamber 40 past the valve 96 into the chamber 88 ready to be forced from this chamber into the chamber 86 when the plunger is again moved downwardly.

Having described the invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a shoe machine, a cement receptacle having a cement-containing chamber, a pump located outside of said chamber, said receptacle and pump being movable as a unit toward a shoe heightwise thereof into position to apply cement to the shoe and reversely movable thereafter away from the shoe, means providing a passage leading from said chamber to the pump, a valve controlling said passage, and means for operating said pump to deliver cement in response to the movement of the receptacle and pump toward the shoe and for thereafter operating the pump to withdrawn cement from said chamber past said valve in response to the movement of the receptacle and pump away from the shoe.

2. In a shoe machine, a device for applying cement to a shoe, said device being movable heightwise of the shoe into cement-applying position and comprisin spring-operated mechanism for delivering cement therefrom, said device comprising also retaining means for preventing said mechanism from operating until near the end of the movement of the device heightwise of the shoe and for then releasing it to render it operative in response to the movement of the device.

3. In a shoe machine, a cement receptacle and a pump movable as a unit heightwise of a shoe into position to apply cement to the shoe, a spring for operating said pump to deliver cement, and means for preventing said spring from operating the pump until near the end of the movement of the receptacle and pump heightwise of the shoe and for then releasing the spring to render it operative.

4. In a shoe machine, a device for applying cement to a shoe, said device being movable heightwise of the shoe into cement-applying position and comprising means movable to deliver cement therefrom, a spring for operating said delivery means, means for subjecting said spring to stress by engagement with one end thereof in response to the movement of the device heightwise of the shoe, and mechanism for controlling the other end of the spring to prevent the spring from operatin said delivery means until the device has arrived substantially in cement-applying position and for then releasing that end of the spring to render it operative.

5. In a shoe machine, a device for applying cement to a shoe, said device comprising a pump movable heightwise of the shoe into cementapplying position and having a plunger for delivering cement therefrom, a spring for operating said plunger, means for subjecting said spring to stress in response to the movement of the pump heightwise of the shoe, and mechanism for preventing operation of the p unger by the sp i until the pump has arrived substantially in cement-applying position and for then rendering the spring effective to operate the plunger.

6. In a shoe machine, a device for applying cement to a shoe, said device comprising a pump movable heightwise of the shoe into cementapplying position and having a plunger for delivering cement therefrom, a spring for operating said plunger, means for subjecting said spring to stress in response to the movement of the pump heightwise of the shoe, a latch for preventing the spring from operating the plunger until the pump has arrived substantially in cementapplying position, and means for then operating said latch in response to the movement of the pump to render the spring effective on the plunger.

7. In a shoe machine, a device for applying cement to a shoe, said device comprising a pump movable heightwise of the shoe into cementapplying position and having a plunger for dee livering cement therefrom, a spring for operating said plunger, a lever for subjecting said spring to stress in response to the movement of the pump heightwise of the shoe, a latch for holding the plunger against movement by the spring until the pump has arrived nearly in cement-applying position, and means for then operating the latch by said lever to release the plunger in response to further movement of the pump.

8. In cement-applying mechanism, a. cementapplying device comprising a pump movable toward the work and havin a plunger for delivering cement therefrom, a spring for operating said plunger, and mechanism for releasing said spring when under stress to render it effective to operate the plunger in response to the movement of the pump toward the work. I

9. In cement-applying mechanism, a cementapplying device comprising a pump movable to-- ward the work and having a, plunger for delivering cement therefrom, a spring for operating said plunger, means for subjecting said spring to stress in response to the movement of the pump toward the work, and mechanism also controlled,

by the movement of the pump toward the work for preventing said spring from operating the plunger while it is being subjected to stress and for then releasing it to render it operative.

10. In cement-applying mechanism, a cementapplying device comprising a pump movable toward the work and having a plunger for delivering cement therefrom, a spring for operating said plunger, means for subjecting said .spring to stress as the pump is moved toward the work, and retaining means for holding said plunger in position to begin its delivery stroke 'while'the spring is thus being subjected to stress and'for then releasing the plunger to the action of the spring.

11. In cement-applying mechanismfa cementapplying device comprising a pump movable toward the work and having a plunger fordelivering said plunger in position to begin its delivery stroke while the spring is thus being subjected to stress and for then releasing it to the action of the spring in response to further movement of the pump toward the work.

12. In cement-applying mechanism, a cement applying device comprising a pump movable toward the work and having a plunger for delivering cement therefrom, a spring for operating said plunger, a lever for subjecting said spring to stress in response to the movement of the pump toward the work, a latch for holding said plunger in position to begin its delivery stroke while the spring is thus being subjected to stress, and means for operating the latch by said lever to release the plunger also in response to the movement of the pump toward the work.

13. In cement-applying mechanism, a cementapplying device comprising a pump movable toward the work and having a plunger for delivering cement therefrom, a rod for operating said plunger, a Spring for operating said rod, means for compressing said spring in response to the movement of the pump toward the work, a latch for holding said rod against movement by the spring while the spring is thus being compressed,

V and means to cause said latch to release the rod when the pump has arrived substantially in ce-s merit-applying position.

14. In cement-applying mechanism, a cement receptacle and a pump movable as a unittoward and from the work, said receptacle having a pcment-containing chamber and the pump being located outside of said chamber, means Providing a passage leading from said chamber to the pump, a spring-controlled valve normally closing said passage, and means controlled by such movements of the receptacle and pump for operating the pump to deliver cement as it is moved toward the work and for operating it to withdraw cement from said chamber past said valve as it is moved away from the work.

15, In-cement-applying mechanism, a cement receptacle and a pump movable as a unit toward the work, a spring for operating said pump, and

. means for releasing said spring when under stress to render it effective thus to operate the pump in response to the movement of the receptacle and pump toward the work.

BERNHARDT J ORGEN SEN. 

